I solved that problem by going to the canned 'burners' used to keep food warm--can't think of what they are called--but they have a wick with a screw on cap and they fit into a cup holder so they are great if you are stuck in a car. I got stuck for several hours when the road was closed due to drifting snow and it kept the truck warm. They burn about 6 hours, so I keep 2 or 3 in each car. You don't have the mess that a candle can cause. You can get them at Sam's Club--I'm sure there are other sources though. Just an idea.